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Tatiana [17]
3 years ago
5

Please help. I’ll mark you as brainliest if correct!

Mathematics
2 answers:
Delvig [45]3 years ago
6 0

Answer:

The two equations are

-2x-4y=20

-3x+5y=-25

multiply equation 1 by 5 and equation 2 by 4

-10x-20y=100

-12x+20y=-100

-22x=0

x=0

Substitute value in either equation

y=-5

So,option 1 is correct only one solution

Readme [11.4K]3 years ago
3 0

Answer:

\large \boxed{\sf \ \ x=0, \ \ y=-5 \ \ }

Step-by-step explanation:

Hello, please consider the following.

We have two equations:

(1) -2x - 4y = 20

(2) -3x + 5y = -25

5*(1)+4*(2) gives

   -10x - 20y -12x + 20y = 100 - 100 = 0

   -22x = 0

   x = 0

I replace in (1)

   -4y = 20

   y = -20/4 = -5

There is one solution x = 0, y = -5

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

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b) 0.3413 . . . . A(1) on the chart

c) 0.4772 . . . . A(2) on the chart

d) 0.4987 . . . . A(3) on the chart

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Find the circumference of a circle with a diameter of 15 inches... Round to the nearest tenth and include units in your answer..
rosijanka [135]

Answer:

<em>47. 1 inches ; where inches ⇒ units</em>

Step-by-step explanation:

Consider the Circumference as such;

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A candle on pauline’s dresser is 10 inches tall and burns at a rate of 0.75 inches per hour. how many hours will it take for the
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Using a linear function, it is found that it will take 13 hours for the candle to burn down to a height of .25 inches.

<h3>What is a linear function?</h3>

A linear function is modeled by:

y = mx + b

In which:

  • m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.
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Considering the situation described, the y-intercept is of 10 while the slope is of -0.75, hence the height of the candle after t hours is given by:

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The height will be of 0.25 inches when h(t) = 0.25, hence:

0.25 = 10 - 0.75t

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More can be learned about linear functions at brainly.com/question/24808124

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6 0
2 years ago
I would like to know the answer pls
Elena L [17]

Answer:

You would explain what I did in the step by step explanation.

Step-by-step explanation:

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